(D) More than four-fifths of the population at large-college graduates and nongraduates combined-ate oatmeal regularly when they were children.
(E) Those college graduates who did not eat oatmeal regularly when they were children did eat oatmeal on an occasional basis.
20. Of the ten professional tennis players who are generally considered the greatest of all time, six had no brothers or sisters. However, only a small portion of the general population is made up of such "only children." Clearly, if you are a professional tennis player, you have a better chance of being considered among the greatest if you are an only child.
Which one of the following, if true, would undermine the argument in the passage?
(A) Some great tennis players never play professionally.
(B) Ascribing "greatness" to tennis players is necessarily subjective.
(C) Among all professional tennis players, seven
(D) An only child tends to be better at individual sports than at team sports.
(E) Parents who have only one child have more time to invest in the child's tennis career than do other parents.
21. The West does not escape the effects of its relationship with the non-Western world. Even as an individual fails to develop fully without constant interaction with an equal, a tradition of thought loses vitality and lacks the capacity for rigorous self-criticism without the probing presence of an authentic "other." In the absence of constant and critical dialogue with other traditions. Western thought remains parochial, commonplace, and narrow.
Which one of the following techniques of argument does the author use in the passage?
(A) identifying a point of similarity between two different states of affairs
(B) reconciling two opposed sets of circumstances with each other
(C) identifying a conclusion that has no supporting argument
(D) deriving a conclusion from a set of conflicting assumptions
(E) taking advantage of inconsistencies in the definition of a critical term
22. George: The economics taught in college is very confusing-and that's because it's all wrong. Harold: If it's all wrong, why is college economics still force-fed to students? George: It's very difficult to learn something that's all wrong, and if, by chance, someone does waste all that time and learn it, he or she will be inclined to defend it ferociously and pass it on to others.
Which one of the following, if true, would most directly challenge George's reasoning?
(A) Many college graduates who have taken economics go on to successful careers in a variety of other fields.
(B) College students who major in economics tend to earn higher grades in economics than in their other subjects.
(C) "Right" and "wrong" are relative terms in the field of economics.
(D) Many economics professors agree with journal articles that strongly criticize college economics.
(E) Interviews five years after graduation show that economics majors are just as likely to say that their college experience was enjoyable as are those who did not major in economics.
23. The existentialists are right about one thing we are alone, radically alone. The proof is obvious. Suppose you were born with a physiology that permitted you to perceive only negative images, that is, you saw black where everyone else saw white and white where everyone else saw black. Nevertheless, you would learn to call what you saw as black by the name "white" because this is what you would be taught, and there would be no way that you could discover your error.
Which one of the following can be validly inferred from the statements in the argument above?